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Weather April in Knoxville, United States of America Visitors to Knoxville during the month of April should plan on bringing a raincoat since it will be raining some days. The amount of rain is high with an average of 83mm (3.3in). The average maximum temperature lies around 16.0Â°C (60.8Â°F). This month is known as a chilly month.
4.9. The highest average temperature in Knoxville is August at 78.6 degrees. The coldest average temperature in Knoxville is January at 40.6 degrees. The most monthly precipitation in Knoxville occurs in July with 5.5 inches. The Knoxville weather information is based on the average of the previous 3-7 years of data. Loading...